Method for avoiding interference from a cellular transmitter to the 2.4/5GHz ISM band

A wireless communications device, comprising:

• a wireless telephone unit contained in a wireless communications device
• a short range wireless communications unit contained in the wireless communications device;
• an interference avoidance subsystem contained in the wireless communications device, coupled to the wireless telephone unit and the short range wireless communications unit;
• said short range wireless communications unit inputting frequency information and time domain operation information to the interference avoidance subsystem;
• said wireless telephone unit inputting frequency hopping information and time domain operation information to the interference avoidance subsystem;
• said interference avoidance subsystem calculating an interference probability between co-existing signals received by the short range wireless communications unit and transmitted from the wireless telephone unit;
• said interference avoidance subsystem comparing the calculated interference probability with a required error rate limit for the short range wireless communications unit;
• and
• said interference avoidance subsystem changing one of the co-existing signals in either the short range wireless communications unit or the wireless telephone unit if the interference probability exceeds the required error rate limit.

A computer program product for a wireless communications device to reduce interference between a wireless telephone unit and a short range wireless communications unit contained therein, comprising:

• a computer readable medium;
• program code in the computer readable medium for inputting frequency information and time domain operation information from the short range wireless communications unit;
• program code in the computer readable medium for inputting frequency hopping information and time domain operation information from the wireless telephone unit;
• program code in the computer readable medium for calculating an interference probability between co-existing signals received by the short range wireless communications unit and transmitted from the wireless telephone unit;
• program code in the computer readable medium for comparing the calculated interference probability with a required error rate limit for the short range wireless communications unit;
• and
• program code in the computer readable medium for changing one of the co-existing signals in either the short range wireless communications unit or the wireless telephone unit if the interference probability exceeds the required error rate limit.